1020212021021 has 2 divisors, whose sum is σ = 1020212021022. Its totient is φ = 1020212021020.

The previous prime is 1020212021009. The next prime is 1020212021029. The reversal of 1020212021021 is 1201202120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1002091092025 + 18120928996 = 1001045^2 + 134614^2 .

It is an emirp because it is prime and its reverse (1201202120201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020212021021 - 2¹⁰ = 1020212019997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020212020987 and 1020212021005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020212021029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106010510 + 510106010511.

It is an arithmetic number, because the mean of its divisors is an integer number (510106010511).

Almost surely, 2^{1020212021021} is an apocalyptic number.

It is an amenable number.

1020212021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212021021 is an equidigital number, since it uses as much as digits as its factorization.

1020212021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1020212021021 its reverse (1201202120201), we get a palindrome (2221414141222).

The spelling of 1020212021021 in words is "one trillion, twenty billion, two hundred twelve million, twenty-one thousand, twenty-one".